In a statement made today, a Vodafone spokesperson told Moneywise: “We can confirm that the monthly charge of all pay monthly contracts taken out on or after 5 May 2016 includes an annual price adjustment by the Retail Price Index (RPI) of 3.6% as published in March. These price changes will come into effect in April 2018. All other prices remain unchanged. Further information can be found online here: www.vodafone.co.uk/rpi"

The telecoms provider, wouldn't however, tell us how many customers are affected and what the average cost increase is.

Vodafone last upped prices in April 2017 by 3.2%.

Can I cancel my contract penalty free?

Affected customers cannot cancel their contract penalty free as a result of this price change.

This is because under Ofcom rules, customers taking out new mobile, landline and broadband contracts from 23 January 2014 can only cancel penalty free if a provider hasn’t made clear at the point of sale that prices can rise mid-contract. Vodafone says it makes it clear that it can raise prices in line with RPI each year.